I even went upstairs to the ship's casino and won a cruise on the Allure of the Seas in December (Cabin + a seat in the $100,000 poker tournament). Read more Navigator of the Seas Reviews Read. Seating up to 418 guests, the Casino lies midship of deck 4. Served by its own bar, the casino offers a range of gaming tables including Caribbean Stud Poker, Let it Ride, American Roulette, Blackjack and Craps and around 300 slot machines of varying denominations for guests to try their luck on. Navigator of the Seas Deck 4 Deck Public Areas. Casino Credit is available to players for gaming on Norwegian Cruise Line. The application process is easy, there is no fee to apply and differed payment terms can be arranged. The minimum application amount is $5,000.00. A personal check is required onboard to activate the credit line. Play Blackjack at Royal Caribbean's casino and try to win a few ways including getting a higher hand than the dealer without going over 21. Come join in on the fun with tons of fun casino cruise ship games and world class entertainment.